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Inventories (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Inventories [Abstract]
Raw materials	$ 10,091,767	$ 10,068,589
Work in process	2,440,035	1,217,968
Finished goods	12,709,730	9,889,197
Total	25,241,532	21,175,754
Demonstration products in finished goods	2,600,000	2,700,000
Inventory held on consignment	$ 600,000	$ 800,000

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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- Definition

Gross amount of inventory owned by the entity but in the hands of a customer, typically a reseller.

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